Added queue_name_delimiter attribute.

- Added ActiveJob::Base#queue_name_delimiter to allow for
  developers using ActiveJob to change the delimiter from the default
  ('_') to whatever else they may be using (e.g., '.', '-', ...).

- Updated source guide to include a blurb about the delimiter.

1 files changed, 4 insertions, 1 deletions

diff --git a/activejob/lib/active_job/queue_name.rb b/activejob/lib/active_job/queue_name.rb
index d167617e4e..6ee7142ce6 100644
--- a/activejob/lib/active_job/queue_name.rb
+++ b/activejob/lib/active_job/queue_name.rb
@@ -26,13 +26,16 @@ module ActiveJob
       def queue_name_from_part(part_name) #:nodoc:
         queue_name = part_name || default_queue_name
         name_parts = [queue_name_prefix.presence, queue_name]
-        name_parts.compact.join('_')
+        name_parts.compact.join(queue_name_delimiter)
       end
     end
 
     included do
       class_attribute :queue_name, instance_accessor: false
+      class_attribute :queue_name_delimiter, instance_accessor: false
+
       self.queue_name = default_queue_name
+      self.queue_name_delimiter = '_' # set default delimiter to '_'
     end
 
     # Returns the name of the queue the job will be run on